Python library for working with simple equations
lallous
Is there is any Python library that allow such things:
Given a string expression as: x + 5 + x * (y + 2), any library that
can develop the equation for example.
Or if we say factor with "x" then it renders the expression with x *
( rest of expression ).
There could be a functionality where when x,y are given then the
expression can be evaluated.
If there are two expressions, they can be added and the symbols
preserved.
Does such a thing exist?
Thanks,
Elias
Chris Rebert
They're called computer algebra systems:
http://en.wikipedia.org/wiki/Computer_algebra_system
SymPy is one for Python:
http://code.google.com/p/sympy/
Don't know if it supports factoring specifically; I've never used it,
I just have Google-Fu.
Cheers,
Chris
--
http://blog.rebertia.com
Daniel Fetchinson
> can develop the equation for example.
> Or if we say factor with "x" then it renders the expression with x *
> ( rest of expression ).
> There could be a functionality where when x,y are given then the
> expression can be evaluated.
> If there are two expressions, they can be added and the symbols
> preserved.
Take a look at sage: http://www.sagemath.org/
I wouldn't say it's simple, in fact it's huge, but it'll do the job.
Cheers,
Daniel
--
Psss, psss, put it down! - http://www.cafepress.com/putitdown
Daniel Fetchinson
>> can develop the equation for example.
>> Or if we say factor with "x" then it renders the expression with x *
>> ( rest of expression ).
>> There could be a functionality where when x,y are given then the
>> expression can be evaluated.
>> If there are two expressions, they can be added and the symbols
>> preserved.
>
> I wouldn't say it's simple, in fact it's huge, but it'll do the job.
Probably you can isolate the part of sage that you actually need and
can throw away 95% of it.
HTH,
geremy condra
> http://mail.python.org/mailman/listinfo/python-list
>
>From sage:
>>> x = var('x')
>>> g = x**2 + x
>>> g(x=5)
30
>>> g.factor
... (x + 1)*x
Geremy Condra